/**
* Retrieves or Creates if none exists, core package property part.
*
* @return The PackageProperties part of this package.
*/
public PackageProperties GetPackageProperties()
{
this.ThrowExceptionIfWriteOnly();
// If no properties part has been found then we Create one
if (this.packageProperties == null)
{
this.packageProperties = new PackagePropertiesPart(this,
PackagingUriHelper.CORE_PROPERTIES_PART_NAME);
}
return this.packageProperties;
}
/**
* Load the parts of the archive if it has not been done yet. The
* relationships of each part are not loaded.
* Note - Rule M4.1 states that there may only ever be one Core
* Properties Part, but Office produced files will sometimes
* have multiple! As Office ignores all but the first, we relax
* Compliance with Rule M4.1, and ignore all others silently too.
* @return All this package's parts.
*/
public List<PackagePart> GetParts()
{
ThrowExceptionIfWriteOnly();
// If the part list is null, we parse the package to retrieve all parts.
if (partList == null)
{
/* Variables use to validate OPC Compliance */
// Check rule M4.1 -> A format consumer shall consider more than
// one core properties relationship for a package to be an error
// (We just log it and move on, as real files break this!)
bool hasCorePropertiesPart = false;
bool needCorePropertiesPart = true;
PackagePart[] parts = this.GetPartsImpl();
this.partList = new PackagePartCollection();
foreach (PackagePart part in parts)
{
bool pnFound = false;
foreach (PackagePartName pn in partList.Keys)
{
if (part.PartName.Name.StartsWith(pn.Name))
{
pnFound = true;
break;
}
}
if (pnFound)
throw new InvalidFormatException(
"A part with the name '"
+ part.PartName +
"' already exist : Packages shall not contain equivalent " +
"part names and package implementers shall neither create " +
"nor recognize packages with equivalent part names. [M1.12]");
// Check OPC compliance rule M4.1
if (part.ContentType.Equals(
ContentTypes.CORE_PROPERTIES_PART))
{
if (!hasCorePropertiesPart)
hasCorePropertiesPart = true;
else
Console.WriteLine(
"OPC Compliance error [M4.1]: there is more than one core properties relationship in the package ! " +
"POI will use only the first, but other software may reject this file.");
}
if (partUnmarshallers.ContainsKey(part.contentType))
{
PartUnmarshaller partUnmarshaller = partUnmarshallers[part.contentType];
UnmarshallContext context = new UnmarshallContext(this,
part.PartName);
try
{
PackagePart unmarshallPart = partUnmarshaller
.Unmarshall(context, part.GetInputStream());
partList[unmarshallPart.PartName] = unmarshallPart;
// Core properties case-- use first CoreProperties part we come across
// and ignore any subsequent ones
if (unmarshallPart is PackagePropertiesPart &&
hasCorePropertiesPart &&
needCorePropertiesPart)
{
this.packageProperties = (PackagePropertiesPart)unmarshallPart;
needCorePropertiesPart = false;
}
}
catch (IOException)
{
logger.Log(POILogger.WARN, "Unmarshall operation : IOException for "
+ part.PartName);
continue;
}
catch (InvalidOperationException invoe)
{
throw new InvalidFormatException(invoe.Message);
}
}
else
{
try
{
partList[part.PartName] = part;
}
catch (InvalidOperationException e)
{
throw new InvalidFormatException(e.Message);
}
}
}
}
return new List<PackagePart>(partList.Values);
}
internal CoreProperties(PackagePropertiesPart part)
{
this.part = part;
}